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/*
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* Block driver for RAW files (posix)
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
25 |
#include "qemu-timer.h" |
26 |
#include "qemu-char.h" |
27 |
#include "qemu-log.h" |
28 |
#include "block_int.h" |
29 |
#include "module.h" |
30 |
#include "block/raw-posix-aio.h" |
31 |
|
32 |
#ifdef CONFIG_COCOA
|
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#include <paths.h> |
34 |
#include <sys/param.h> |
35 |
#include <IOKit/IOKitLib.h> |
36 |
#include <IOKit/IOBSD.h> |
37 |
#include <IOKit/storage/IOMediaBSDClient.h> |
38 |
#include <IOKit/storage/IOMedia.h> |
39 |
#include <IOKit/storage/IOCDMedia.h> |
40 |
//#include <IOKit/storage/IOCDTypes.h>
|
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#include <CoreFoundation/CoreFoundation.h> |
42 |
#endif
|
43 |
|
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#ifdef __sun__
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#define _POSIX_PTHREAD_SEMANTICS 1 |
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#include <signal.h> |
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#include <sys/dkio.h> |
48 |
#endif
|
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#ifdef __linux__
|
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#include <sys/ioctl.h> |
51 |
#include <linux/cdrom.h> |
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#include <linux/fd.h> |
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#endif
|
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#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
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#include <signal.h> |
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#include <sys/disk.h> |
57 |
#include <sys/cdio.h> |
58 |
#endif
|
59 |
|
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#ifdef __OpenBSD__
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#include <sys/ioctl.h> |
62 |
#include <sys/disklabel.h> |
63 |
#include <sys/dkio.h> |
64 |
#endif
|
65 |
|
66 |
#ifdef __DragonFly__
|
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#include <sys/ioctl.h> |
68 |
#include <sys/diskslice.h> |
69 |
#endif
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70 |
|
71 |
//#define DEBUG_FLOPPY
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72 |
|
73 |
//#define DEBUG_BLOCK
|
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#if defined(DEBUG_BLOCK)
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#define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
76 |
{ qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) |
77 |
#else
|
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#define DEBUG_BLOCK_PRINT(formatCstr, ...)
|
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#endif
|
80 |
|
81 |
/* OS X does not have O_DSYNC */
|
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#ifndef O_DSYNC
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#ifdef O_SYNC
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#define O_DSYNC O_SYNC
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#elif defined(O_FSYNC)
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#define O_DSYNC O_FSYNC
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#endif
|
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#endif
|
89 |
|
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/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
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#ifndef O_DIRECT
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#define O_DIRECT O_DSYNC
|
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#endif
|
94 |
|
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#define FTYPE_FILE 0 |
96 |
#define FTYPE_CD 1 |
97 |
#define FTYPE_FD 2 |
98 |
|
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#define ALIGNED_BUFFER_SIZE (32 * 512) |
100 |
|
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/* if the FD is not accessed during that time (in ms), we try to
|
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reopen it to see if the disk has been changed */
|
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#define FD_OPEN_TIMEOUT 1000 |
104 |
|
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typedef struct BDRVRawState { |
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int fd;
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int type;
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unsigned int lseek_err_cnt; |
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int open_flags;
|
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#if defined(__linux__)
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/* linux floppy specific */
|
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int64_t fd_open_time; |
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int64_t fd_error_time; |
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int fd_got_error;
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int fd_media_changed;
|
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#endif
|
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#ifdef CONFIG_LINUX_AIO
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int use_aio;
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void *aio_ctx;
|
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#endif
|
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uint8_t* aligned_buf; |
122 |
} BDRVRawState; |
123 |
|
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static int fd_open(BlockDriverState *bs); |
125 |
static int64_t raw_getlength(BlockDriverState *bs);
|
126 |
|
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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static int cdrom_reopen(BlockDriverState *bs); |
129 |
#endif
|
130 |
|
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static int raw_open_common(BlockDriverState *bs, const char *filename, |
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int bdrv_flags, int open_flags) |
133 |
{ |
134 |
BDRVRawState *s = bs->opaque; |
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int fd, ret;
|
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|
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s->lseek_err_cnt = 0;
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138 |
|
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s->open_flags = open_flags | O_BINARY; |
140 |
s->open_flags &= ~O_ACCMODE; |
141 |
if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) {
|
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s->open_flags |= O_RDWR; |
143 |
} else {
|
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s->open_flags |= O_RDONLY; |
145 |
bs->read_only = 1;
|
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} |
147 |
|
148 |
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
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* and O_DIRECT for no caching. */
|
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if ((bdrv_flags & BDRV_O_NOCACHE))
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s->open_flags |= O_DIRECT; |
152 |
else if (!(bdrv_flags & BDRV_O_CACHE_WB)) |
153 |
s->open_flags |= O_DSYNC; |
154 |
|
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s->fd = -1;
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fd = open(filename, s->open_flags, 0644);
|
157 |
if (fd < 0) { |
158 |
ret = -errno; |
159 |
if (ret == -EROFS)
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ret = -EACCES; |
161 |
return ret;
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} |
163 |
s->fd = fd; |
164 |
s->aligned_buf = NULL;
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165 |
|
166 |
if ((bdrv_flags & BDRV_O_NOCACHE)) {
|
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s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE); |
168 |
if (s->aligned_buf == NULL) { |
169 |
goto out_close;
|
170 |
} |
171 |
} |
172 |
|
173 |
#ifdef CONFIG_LINUX_AIO
|
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if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
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(BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { |
176 |
|
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/* We're falling back to POSIX AIO in some cases */
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paio_init(); |
179 |
|
180 |
s->aio_ctx = laio_init(); |
181 |
if (!s->aio_ctx) {
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goto out_free_buf;
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183 |
} |
184 |
s->use_aio = 1;
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185 |
} else
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186 |
#endif
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187 |
{ |
188 |
if (paio_init() < 0) { |
189 |
goto out_free_buf;
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190 |
} |
191 |
#ifdef CONFIG_LINUX_AIO
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s->use_aio = 0;
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193 |
#endif
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194 |
} |
195 |
|
196 |
return 0; |
197 |
|
198 |
out_free_buf:
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199 |
qemu_vfree(s->aligned_buf); |
200 |
out_close:
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201 |
close(fd); |
202 |
return -errno;
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203 |
} |
204 |
|
205 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
206 |
{ |
207 |
BDRVRawState *s = bs->opaque; |
208 |
int open_flags = 0; |
209 |
|
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s->type = FTYPE_FILE; |
211 |
if (flags & BDRV_O_CREAT)
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open_flags = O_CREAT | O_TRUNC; |
213 |
|
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return raw_open_common(bs, filename, flags, open_flags);
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} |
216 |
|
217 |
/* XXX: use host sector size if necessary with:
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218 |
#ifdef DIOCGSECTORSIZE
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219 |
{
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220 |
unsigned int sectorsize = 512;
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221 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
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222 |
sectorsize > bufsize)
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bufsize = sectorsize;
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}
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#endif
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#ifdef CONFIG_COCOA
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227 |
u_int32_t blockSize = 512;
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if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
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bufsize = blockSize;
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}
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#endif
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*/
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233 |
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234 |
/*
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* offset and count are in bytes, but must be multiples of 512 for files
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236 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
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237 |
*
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238 |
* This function may be called without alignment if the caller ensures
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239 |
* that O_DIRECT is not in effect.
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240 |
*/
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241 |
static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
242 |
uint8_t *buf, int count)
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243 |
{ |
244 |
BDRVRawState *s = bs->opaque; |
245 |
int ret;
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246 |
|
247 |
ret = fd_open(bs); |
248 |
if (ret < 0) |
249 |
return ret;
|
250 |
|
251 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
252 |
++(s->lseek_err_cnt); |
253 |
if(s->lseek_err_cnt <= 10) { |
254 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
255 |
"] lseek failed : %d = %s\n",
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s->fd, bs->filename, offset, buf, count, |
257 |
bs->total_sectors, errno, strerror(errno)); |
258 |
} |
259 |
return -1; |
260 |
} |
261 |
s->lseek_err_cnt=0;
|
262 |
|
263 |
ret = read(s->fd, buf, count); |
264 |
if (ret == count)
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goto label__raw_read__success;
|
266 |
|
267 |
/* Allow reads beyond the end (needed for pwrite) */
|
268 |
if ((ret == 0) && bs->growable) { |
269 |
int64_t size = raw_getlength(bs); |
270 |
if (offset >= size) {
|
271 |
memset(buf, 0, count);
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272 |
ret = count; |
273 |
goto label__raw_read__success;
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274 |
} |
275 |
} |
276 |
|
277 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
278 |
"] read failed %d : %d = %s\n",
|
279 |
s->fd, bs->filename, offset, buf, count, |
280 |
bs->total_sectors, ret, errno, strerror(errno)); |
281 |
|
282 |
/* Try harder for CDrom. */
|
283 |
if (bs->type == BDRV_TYPE_CDROM) {
|
284 |
lseek(s->fd, offset, SEEK_SET); |
285 |
ret = read(s->fd, buf, count); |
286 |
if (ret == count)
|
287 |
goto label__raw_read__success;
|
288 |
lseek(s->fd, offset, SEEK_SET); |
289 |
ret = read(s->fd, buf, count); |
290 |
if (ret == count)
|
291 |
goto label__raw_read__success;
|
292 |
|
293 |
DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
294 |
"] retry read failed %d : %d = %s\n",
|
295 |
s->fd, bs->filename, offset, buf, count, |
296 |
bs->total_sectors, ret, errno, strerror(errno)); |
297 |
} |
298 |
|
299 |
label__raw_read__success:
|
300 |
|
301 |
return (ret < 0) ? -errno : ret; |
302 |
} |
303 |
|
304 |
/*
|
305 |
* offset and count are in bytes, but must be multiples of 512 for files
|
306 |
* opened with O_DIRECT. buf must be aligned to 512 bytes then.
|
307 |
*
|
308 |
* This function may be called without alignment if the caller ensures
|
309 |
* that O_DIRECT is not in effect.
|
310 |
*/
|
311 |
static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
312 |
const uint8_t *buf, int count) |
313 |
{ |
314 |
BDRVRawState *s = bs->opaque; |
315 |
int ret;
|
316 |
|
317 |
ret = fd_open(bs); |
318 |
if (ret < 0) |
319 |
return -errno;
|
320 |
|
321 |
if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
322 |
++(s->lseek_err_cnt); |
323 |
if(s->lseek_err_cnt) {
|
324 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
325 |
PRId64 "] lseek failed : %d = %s\n",
|
326 |
s->fd, bs->filename, offset, buf, count, |
327 |
bs->total_sectors, errno, strerror(errno)); |
328 |
} |
329 |
return -EIO;
|
330 |
} |
331 |
s->lseek_err_cnt = 0;
|
332 |
|
333 |
ret = write(s->fd, buf, count); |
334 |
if (ret == count)
|
335 |
goto label__raw_write__success;
|
336 |
|
337 |
DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
338 |
"] write failed %d : %d = %s\n",
|
339 |
s->fd, bs->filename, offset, buf, count, |
340 |
bs->total_sectors, ret, errno, strerror(errno)); |
341 |
|
342 |
label__raw_write__success:
|
343 |
|
344 |
return (ret < 0) ? -errno : ret; |
345 |
} |
346 |
|
347 |
|
348 |
/*
|
349 |
* offset and count are in bytes and possibly not aligned. For files opened
|
350 |
* with O_DIRECT, necessary alignments are ensured before calling
|
351 |
* raw_pread_aligned to do the actual read.
|
352 |
*/
|
353 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
354 |
uint8_t *buf, int count)
|
355 |
{ |
356 |
BDRVRawState *s = bs->opaque; |
357 |
int size, ret, shift, sum;
|
358 |
|
359 |
sum = 0;
|
360 |
|
361 |
if (s->aligned_buf != NULL) { |
362 |
|
363 |
if (offset & 0x1ff) { |
364 |
/* align offset on a 512 bytes boundary */
|
365 |
|
366 |
shift = offset & 0x1ff;
|
367 |
size = (shift + count + 0x1ff) & ~0x1ff; |
368 |
if (size > ALIGNED_BUFFER_SIZE)
|
369 |
size = ALIGNED_BUFFER_SIZE; |
370 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
371 |
if (ret < 0) |
372 |
return ret;
|
373 |
|
374 |
size = 512 - shift;
|
375 |
if (size > count)
|
376 |
size = count; |
377 |
memcpy(buf, s->aligned_buf + shift, size); |
378 |
|
379 |
buf += size; |
380 |
offset += size; |
381 |
count -= size; |
382 |
sum += size; |
383 |
|
384 |
if (count == 0) |
385 |
return sum;
|
386 |
} |
387 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
388 |
|
389 |
/* read on aligned buffer */
|
390 |
|
391 |
while (count) {
|
392 |
|
393 |
size = (count + 0x1ff) & ~0x1ff; |
394 |
if (size > ALIGNED_BUFFER_SIZE)
|
395 |
size = ALIGNED_BUFFER_SIZE; |
396 |
|
397 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
398 |
if (ret < 0) |
399 |
return ret;
|
400 |
|
401 |
size = ret; |
402 |
if (size > count)
|
403 |
size = count; |
404 |
|
405 |
memcpy(buf, s->aligned_buf, size); |
406 |
|
407 |
buf += size; |
408 |
offset += size; |
409 |
count -= size; |
410 |
sum += size; |
411 |
} |
412 |
|
413 |
return sum;
|
414 |
} |
415 |
} |
416 |
|
417 |
return raw_pread_aligned(bs, offset, buf, count) + sum;
|
418 |
} |
419 |
|
420 |
static int raw_read(BlockDriverState *bs, int64_t sector_num, |
421 |
uint8_t *buf, int nb_sectors)
|
422 |
{ |
423 |
int ret;
|
424 |
|
425 |
ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512); |
426 |
if (ret == (nb_sectors * 512)) |
427 |
ret = 0;
|
428 |
return ret;
|
429 |
} |
430 |
|
431 |
/*
|
432 |
* offset and count are in bytes and possibly not aligned. For files opened
|
433 |
* with O_DIRECT, necessary alignments are ensured before calling
|
434 |
* raw_pwrite_aligned to do the actual write.
|
435 |
*/
|
436 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
437 |
const uint8_t *buf, int count) |
438 |
{ |
439 |
BDRVRawState *s = bs->opaque; |
440 |
int size, ret, shift, sum;
|
441 |
|
442 |
sum = 0;
|
443 |
|
444 |
if (s->aligned_buf != NULL) { |
445 |
|
446 |
if (offset & 0x1ff) { |
447 |
/* align offset on a 512 bytes boundary */
|
448 |
shift = offset & 0x1ff;
|
449 |
ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512);
|
450 |
if (ret < 0) |
451 |
return ret;
|
452 |
|
453 |
size = 512 - shift;
|
454 |
if (size > count)
|
455 |
size = count; |
456 |
memcpy(s->aligned_buf + shift, buf, size); |
457 |
|
458 |
ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512);
|
459 |
if (ret < 0) |
460 |
return ret;
|
461 |
|
462 |
buf += size; |
463 |
offset += size; |
464 |
count -= size; |
465 |
sum += size; |
466 |
|
467 |
if (count == 0) |
468 |
return sum;
|
469 |
} |
470 |
if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
471 |
|
472 |
while ((size = (count & ~0x1ff)) != 0) { |
473 |
|
474 |
if (size > ALIGNED_BUFFER_SIZE)
|
475 |
size = ALIGNED_BUFFER_SIZE; |
476 |
|
477 |
memcpy(s->aligned_buf, buf, size); |
478 |
|
479 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
480 |
if (ret < 0) |
481 |
return ret;
|
482 |
|
483 |
buf += ret; |
484 |
offset += ret; |
485 |
count -= ret; |
486 |
sum += ret; |
487 |
} |
488 |
/* here, count < 512 because (count & ~0x1ff) == 0 */
|
489 |
if (count) {
|
490 |
ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512);
|
491 |
if (ret < 0) |
492 |
return ret;
|
493 |
memcpy(s->aligned_buf, buf, count); |
494 |
|
495 |
ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512);
|
496 |
if (ret < 0) |
497 |
return ret;
|
498 |
if (count < ret)
|
499 |
ret = count; |
500 |
|
501 |
sum += ret; |
502 |
} |
503 |
return sum;
|
504 |
} |
505 |
} |
506 |
return raw_pwrite_aligned(bs, offset, buf, count) + sum;
|
507 |
} |
508 |
|
509 |
static int raw_write(BlockDriverState *bs, int64_t sector_num, |
510 |
const uint8_t *buf, int nb_sectors) |
511 |
{ |
512 |
int ret;
|
513 |
ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512); |
514 |
if (ret == (nb_sectors * 512)) |
515 |
ret = 0;
|
516 |
return ret;
|
517 |
} |
518 |
|
519 |
/*
|
520 |
* Check if all memory in this vector is sector aligned.
|
521 |
*/
|
522 |
static int qiov_is_aligned(QEMUIOVector *qiov) |
523 |
{ |
524 |
int i;
|
525 |
|
526 |
for (i = 0; i < qiov->niov; i++) { |
527 |
if ((uintptr_t) qiov->iov[i].iov_base % 512) { |
528 |
return 0; |
529 |
} |
530 |
} |
531 |
|
532 |
return 1; |
533 |
} |
534 |
|
535 |
static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
|
536 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
537 |
BlockDriverCompletionFunc *cb, void *opaque, int type) |
538 |
{ |
539 |
BDRVRawState *s = bs->opaque; |
540 |
|
541 |
if (fd_open(bs) < 0) |
542 |
return NULL; |
543 |
|
544 |
/*
|
545 |
* If O_DIRECT is used the buffer needs to be aligned on a sector
|
546 |
* boundary. Check if this is the case or telll the low-level
|
547 |
* driver that it needs to copy the buffer.
|
548 |
*/
|
549 |
if (s->aligned_buf) {
|
550 |
if (!qiov_is_aligned(qiov)) {
|
551 |
type |= QEMU_AIO_MISALIGNED; |
552 |
#ifdef CONFIG_LINUX_AIO
|
553 |
} else if (s->use_aio) { |
554 |
return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov,
|
555 |
nb_sectors, cb, opaque, type); |
556 |
#endif
|
557 |
} |
558 |
} |
559 |
|
560 |
return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors,
|
561 |
cb, opaque, type); |
562 |
} |
563 |
|
564 |
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
|
565 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
566 |
BlockDriverCompletionFunc *cb, void *opaque)
|
567 |
{ |
568 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
569 |
cb, opaque, QEMU_AIO_READ); |
570 |
} |
571 |
|
572 |
static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
|
573 |
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
574 |
BlockDriverCompletionFunc *cb, void *opaque)
|
575 |
{ |
576 |
return raw_aio_submit(bs, sector_num, qiov, nb_sectors,
|
577 |
cb, opaque, QEMU_AIO_WRITE); |
578 |
} |
579 |
|
580 |
static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
|
581 |
BlockDriverCompletionFunc *cb, void *opaque)
|
582 |
{ |
583 |
BDRVRawState *s = bs->opaque; |
584 |
|
585 |
if (fd_open(bs) < 0) |
586 |
return NULL; |
587 |
|
588 |
return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
589 |
} |
590 |
|
591 |
static void raw_close(BlockDriverState *bs) |
592 |
{ |
593 |
BDRVRawState *s = bs->opaque; |
594 |
if (s->fd >= 0) { |
595 |
close(s->fd); |
596 |
s->fd = -1;
|
597 |
if (s->aligned_buf != NULL) |
598 |
qemu_free(s->aligned_buf); |
599 |
} |
600 |
} |
601 |
|
602 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
603 |
{ |
604 |
BDRVRawState *s = bs->opaque; |
605 |
if (s->type != FTYPE_FILE)
|
606 |
return -ENOTSUP;
|
607 |
if (ftruncate(s->fd, offset) < 0) |
608 |
return -errno;
|
609 |
return 0; |
610 |
} |
611 |
|
612 |
#ifdef __OpenBSD__
|
613 |
static int64_t raw_getlength(BlockDriverState *bs)
|
614 |
{ |
615 |
BDRVRawState *s = bs->opaque; |
616 |
int fd = s->fd;
|
617 |
struct stat st;
|
618 |
|
619 |
if (fstat(fd, &st))
|
620 |
return -1; |
621 |
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
|
622 |
struct disklabel dl;
|
623 |
|
624 |
if (ioctl(fd, DIOCGDINFO, &dl))
|
625 |
return -1; |
626 |
return (uint64_t)dl.d_secsize *
|
627 |
dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
628 |
} else
|
629 |
return st.st_size;
|
630 |
} |
631 |
#else /* !__OpenBSD__ */ |
632 |
static int64_t raw_getlength(BlockDriverState *bs)
|
633 |
{ |
634 |
BDRVRawState *s = bs->opaque; |
635 |
int fd = s->fd;
|
636 |
int64_t size; |
637 |
#ifdef CONFIG_BSD
|
638 |
struct stat sb;
|
639 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
640 |
int reopened = 0; |
641 |
#endif
|
642 |
#endif
|
643 |
#ifdef __sun__
|
644 |
struct dk_minfo minfo;
|
645 |
int rv;
|
646 |
#endif
|
647 |
int ret;
|
648 |
|
649 |
ret = fd_open(bs); |
650 |
if (ret < 0) |
651 |
return ret;
|
652 |
|
653 |
#ifdef CONFIG_BSD
|
654 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
655 |
again:
|
656 |
#endif
|
657 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
658 |
#ifdef DIOCGMEDIASIZE
|
659 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
660 |
#elif defined(DIOCGPART)
|
661 |
{ |
662 |
struct partinfo pi;
|
663 |
if (ioctl(fd, DIOCGPART, &pi) == 0) |
664 |
size = pi.media_size; |
665 |
else
|
666 |
size = 0;
|
667 |
} |
668 |
if (size == 0) |
669 |
#endif
|
670 |
#ifdef CONFIG_COCOA
|
671 |
size = LONG_LONG_MAX; |
672 |
#else
|
673 |
size = lseek(fd, 0LL, SEEK_END);
|
674 |
#endif
|
675 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
676 |
switch(s->type) {
|
677 |
case FTYPE_CD:
|
678 |
/* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
|
679 |
if (size == 2048LL * (unsigned)-1) |
680 |
size = 0;
|
681 |
/* XXX no disc? maybe we need to reopen... */
|
682 |
if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
683 |
reopened = 1;
|
684 |
goto again;
|
685 |
} |
686 |
} |
687 |
#endif
|
688 |
} else
|
689 |
#endif
|
690 |
#ifdef __sun__
|
691 |
/*
|
692 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
693 |
*/
|
694 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
695 |
if ( rv != -1 ) { |
696 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
697 |
} else /* there are reports that lseek on some devices |
698 |
fails, but irc discussion said that contingency
|
699 |
on contingency was overkill */
|
700 |
#endif
|
701 |
{ |
702 |
size = lseek(fd, 0, SEEK_END);
|
703 |
} |
704 |
return size;
|
705 |
} |
706 |
#endif
|
707 |
|
708 |
static int raw_create(const char *filename, QEMUOptionParameter *options) |
709 |
{ |
710 |
int fd;
|
711 |
int result = 0; |
712 |
int64_t total_size = 0;
|
713 |
|
714 |
/* Read out options */
|
715 |
while (options && options->name) {
|
716 |
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
717 |
total_size = options->value.n / 512;
|
718 |
} |
719 |
options++; |
720 |
} |
721 |
|
722 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
723 |
0644);
|
724 |
if (fd < 0) { |
725 |
result = -errno; |
726 |
} else {
|
727 |
if (ftruncate(fd, total_size * 512) != 0) { |
728 |
result = -errno; |
729 |
} |
730 |
if (close(fd) != 0) { |
731 |
result = -errno; |
732 |
} |
733 |
} |
734 |
return result;
|
735 |
} |
736 |
|
737 |
static void raw_flush(BlockDriverState *bs) |
738 |
{ |
739 |
BDRVRawState *s = bs->opaque; |
740 |
qemu_fdatasync(s->fd); |
741 |
} |
742 |
|
743 |
|
744 |
static QEMUOptionParameter raw_create_options[] = {
|
745 |
{ |
746 |
.name = BLOCK_OPT_SIZE, |
747 |
.type = OPT_SIZE, |
748 |
.help = "Virtual disk size"
|
749 |
}, |
750 |
{ NULL }
|
751 |
}; |
752 |
|
753 |
static BlockDriver bdrv_raw = {
|
754 |
.format_name = "raw",
|
755 |
.instance_size = sizeof(BDRVRawState),
|
756 |
.bdrv_probe = NULL, /* no probe for protocols */ |
757 |
.bdrv_open = raw_open, |
758 |
.bdrv_read = raw_read, |
759 |
.bdrv_write = raw_write, |
760 |
.bdrv_close = raw_close, |
761 |
.bdrv_create = raw_create, |
762 |
.bdrv_flush = raw_flush, |
763 |
|
764 |
.bdrv_aio_readv = raw_aio_readv, |
765 |
.bdrv_aio_writev = raw_aio_writev, |
766 |
.bdrv_aio_flush = raw_aio_flush, |
767 |
|
768 |
.bdrv_truncate = raw_truncate, |
769 |
.bdrv_getlength = raw_getlength, |
770 |
|
771 |
.create_options = raw_create_options, |
772 |
}; |
773 |
|
774 |
/***********************************************/
|
775 |
/* host device */
|
776 |
|
777 |
#ifdef CONFIG_COCOA
|
778 |
static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
|
779 |
static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
780 |
|
781 |
kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
782 |
{ |
783 |
kern_return_t kernResult; |
784 |
mach_port_t masterPort; |
785 |
CFMutableDictionaryRef classesToMatch; |
786 |
|
787 |
kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
788 |
if ( KERN_SUCCESS != kernResult ) {
|
789 |
printf( "IOMasterPort returned %d\n", kernResult );
|
790 |
} |
791 |
|
792 |
classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
793 |
if ( classesToMatch == NULL ) { |
794 |
printf( "IOServiceMatching returned a NULL dictionary.\n" );
|
795 |
} else {
|
796 |
CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
797 |
} |
798 |
kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
799 |
if ( KERN_SUCCESS != kernResult )
|
800 |
{ |
801 |
printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
|
802 |
} |
803 |
|
804 |
return kernResult;
|
805 |
} |
806 |
|
807 |
kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
|
808 |
{ |
809 |
io_object_t nextMedia; |
810 |
kern_return_t kernResult = KERN_FAILURE; |
811 |
*bsdPath = '\0';
|
812 |
nextMedia = IOIteratorNext( mediaIterator ); |
813 |
if ( nextMedia )
|
814 |
{ |
815 |
CFTypeRef bsdPathAsCFString; |
816 |
bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
|
817 |
if ( bsdPathAsCFString ) {
|
818 |
size_t devPathLength; |
819 |
strcpy( bsdPath, _PATH_DEV ); |
820 |
strcat( bsdPath, "r" );
|
821 |
devPathLength = strlen( bsdPath ); |
822 |
if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
|
823 |
kernResult = KERN_SUCCESS; |
824 |
} |
825 |
CFRelease( bsdPathAsCFString ); |
826 |
} |
827 |
IOObjectRelease( nextMedia ); |
828 |
} |
829 |
|
830 |
return kernResult;
|
831 |
} |
832 |
|
833 |
#endif
|
834 |
|
835 |
static int hdev_probe_device(const char *filename) |
836 |
{ |
837 |
struct stat st;
|
838 |
|
839 |
/* allow a dedicated CD-ROM driver to match with a higher priority */
|
840 |
if (strstart(filename, "/dev/cdrom", NULL)) |
841 |
return 50; |
842 |
|
843 |
if (stat(filename, &st) >= 0 && |
844 |
(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
845 |
return 100; |
846 |
} |
847 |
|
848 |
return 0; |
849 |
} |
850 |
|
851 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
852 |
{ |
853 |
BDRVRawState *s = bs->opaque; |
854 |
|
855 |
#ifdef CONFIG_COCOA
|
856 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
857 |
kern_return_t kernResult; |
858 |
io_iterator_t mediaIterator; |
859 |
char bsdPath[ MAXPATHLEN ];
|
860 |
int fd;
|
861 |
|
862 |
kernResult = FindEjectableCDMedia( &mediaIterator ); |
863 |
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
|
864 |
|
865 |
if ( bsdPath[ 0 ] != '\0' ) { |
866 |
strcat(bsdPath,"s0");
|
867 |
/* some CDs don't have a partition 0 */
|
868 |
fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
869 |
if (fd < 0) { |
870 |
bsdPath[strlen(bsdPath)-1] = '1'; |
871 |
} else {
|
872 |
close(fd); |
873 |
} |
874 |
filename = bsdPath; |
875 |
} |
876 |
|
877 |
if ( mediaIterator )
|
878 |
IOObjectRelease( mediaIterator ); |
879 |
} |
880 |
#endif
|
881 |
|
882 |
s->type = FTYPE_FILE; |
883 |
#if defined(__linux__)
|
884 |
if (strstart(filename, "/dev/sg", NULL)) { |
885 |
bs->sg = 1;
|
886 |
} |
887 |
#endif
|
888 |
|
889 |
return raw_open_common(bs, filename, flags, 0); |
890 |
} |
891 |
|
892 |
#if defined(__linux__)
|
893 |
/* Note: we do not have a reliable method to detect if the floppy is
|
894 |
present. The current method is to try to open the floppy at every
|
895 |
I/O and to keep it opened during a few hundreds of ms. */
|
896 |
static int fd_open(BlockDriverState *bs) |
897 |
{ |
898 |
BDRVRawState *s = bs->opaque; |
899 |
int last_media_present;
|
900 |
|
901 |
if (s->type != FTYPE_FD)
|
902 |
return 0; |
903 |
last_media_present = (s->fd >= 0);
|
904 |
if (s->fd >= 0 && |
905 |
(qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
906 |
close(s->fd); |
907 |
s->fd = -1;
|
908 |
#ifdef DEBUG_FLOPPY
|
909 |
printf("Floppy closed\n");
|
910 |
#endif
|
911 |
} |
912 |
if (s->fd < 0) { |
913 |
if (s->fd_got_error &&
|
914 |
(qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
915 |
#ifdef DEBUG_FLOPPY
|
916 |
printf("No floppy (open delayed)\n");
|
917 |
#endif
|
918 |
return -EIO;
|
919 |
} |
920 |
s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
921 |
if (s->fd < 0) { |
922 |
s->fd_error_time = qemu_get_clock(rt_clock); |
923 |
s->fd_got_error = 1;
|
924 |
if (last_media_present)
|
925 |
s->fd_media_changed = 1;
|
926 |
#ifdef DEBUG_FLOPPY
|
927 |
printf("No floppy\n");
|
928 |
#endif
|
929 |
return -EIO;
|
930 |
} |
931 |
#ifdef DEBUG_FLOPPY
|
932 |
printf("Floppy opened\n");
|
933 |
#endif
|
934 |
} |
935 |
if (!last_media_present)
|
936 |
s->fd_media_changed = 1;
|
937 |
s->fd_open_time = qemu_get_clock(rt_clock); |
938 |
s->fd_got_error = 0;
|
939 |
return 0; |
940 |
} |
941 |
|
942 |
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
943 |
{ |
944 |
BDRVRawState *s = bs->opaque; |
945 |
|
946 |
return ioctl(s->fd, req, buf);
|
947 |
} |
948 |
|
949 |
static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
|
950 |
unsigned long int req, void *buf, |
951 |
BlockDriverCompletionFunc *cb, void *opaque)
|
952 |
{ |
953 |
BDRVRawState *s = bs->opaque; |
954 |
|
955 |
if (fd_open(bs) < 0) |
956 |
return NULL; |
957 |
return paio_ioctl(bs, s->fd, req, buf, cb, opaque);
|
958 |
} |
959 |
|
960 |
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
961 |
static int fd_open(BlockDriverState *bs) |
962 |
{ |
963 |
BDRVRawState *s = bs->opaque; |
964 |
|
965 |
/* this is just to ensure s->fd is sane (its called by io ops) */
|
966 |
if (s->fd >= 0) |
967 |
return 0; |
968 |
return -EIO;
|
969 |
} |
970 |
#else /* !linux && !FreeBSD */ |
971 |
|
972 |
static int fd_open(BlockDriverState *bs) |
973 |
{ |
974 |
return 0; |
975 |
} |
976 |
|
977 |
#endif /* !linux && !FreeBSD */ |
978 |
|
979 |
static int hdev_create(const char *filename, QEMUOptionParameter *options) |
980 |
{ |
981 |
int fd;
|
982 |
int ret = 0; |
983 |
struct stat stat_buf;
|
984 |
int64_t total_size = 0;
|
985 |
|
986 |
/* Read out options */
|
987 |
while (options && options->name) {
|
988 |
if (!strcmp(options->name, "size")) { |
989 |
total_size = options->value.n / 512;
|
990 |
} |
991 |
options++; |
992 |
} |
993 |
|
994 |
fd = open(filename, O_WRONLY | O_BINARY); |
995 |
if (fd < 0) |
996 |
return -EIO;
|
997 |
|
998 |
if (fstat(fd, &stat_buf) < 0) |
999 |
ret = -EIO; |
1000 |
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
1001 |
ret = -EIO; |
1002 |
else if (lseek(fd, 0, SEEK_END) < total_size * 512) |
1003 |
ret = -ENOSPC; |
1004 |
|
1005 |
close(fd); |
1006 |
return ret;
|
1007 |
} |
1008 |
|
1009 |
static BlockDriver bdrv_host_device = {
|
1010 |
.format_name = "host_device",
|
1011 |
.instance_size = sizeof(BDRVRawState),
|
1012 |
.bdrv_probe_device = hdev_probe_device, |
1013 |
.bdrv_open = hdev_open, |
1014 |
.bdrv_close = raw_close, |
1015 |
.bdrv_create = hdev_create, |
1016 |
.create_options = raw_create_options, |
1017 |
.bdrv_flush = raw_flush, |
1018 |
|
1019 |
.bdrv_aio_readv = raw_aio_readv, |
1020 |
.bdrv_aio_writev = raw_aio_writev, |
1021 |
.bdrv_aio_flush = raw_aio_flush, |
1022 |
|
1023 |
.bdrv_read = raw_read, |
1024 |
.bdrv_write = raw_write, |
1025 |
.bdrv_getlength = raw_getlength, |
1026 |
|
1027 |
/* generic scsi device */
|
1028 |
#ifdef __linux__
|
1029 |
.bdrv_ioctl = hdev_ioctl, |
1030 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1031 |
#endif
|
1032 |
}; |
1033 |
|
1034 |
#ifdef __linux__
|
1035 |
static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
1036 |
{ |
1037 |
BDRVRawState *s = bs->opaque; |
1038 |
int ret;
|
1039 |
|
1040 |
s->type = FTYPE_FD; |
1041 |
|
1042 |
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
|
1043 |
ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
1044 |
if (ret)
|
1045 |
return ret;
|
1046 |
|
1047 |
/* close fd so that we can reopen it as needed */
|
1048 |
close(s->fd); |
1049 |
s->fd = -1;
|
1050 |
s->fd_media_changed = 1;
|
1051 |
|
1052 |
return 0; |
1053 |
} |
1054 |
|
1055 |
static int floppy_probe_device(const char *filename) |
1056 |
{ |
1057 |
if (strstart(filename, "/dev/fd", NULL)) |
1058 |
return 100; |
1059 |
return 0; |
1060 |
} |
1061 |
|
1062 |
|
1063 |
static int floppy_is_inserted(BlockDriverState *bs) |
1064 |
{ |
1065 |
return fd_open(bs) >= 0; |
1066 |
} |
1067 |
|
1068 |
static int floppy_media_changed(BlockDriverState *bs) |
1069 |
{ |
1070 |
BDRVRawState *s = bs->opaque; |
1071 |
int ret;
|
1072 |
|
1073 |
/*
|
1074 |
* XXX: we do not have a true media changed indication.
|
1075 |
* It does not work if the floppy is changed without trying to read it.
|
1076 |
*/
|
1077 |
fd_open(bs); |
1078 |
ret = s->fd_media_changed; |
1079 |
s->fd_media_changed = 0;
|
1080 |
#ifdef DEBUG_FLOPPY
|
1081 |
printf("Floppy changed=%d\n", ret);
|
1082 |
#endif
|
1083 |
return ret;
|
1084 |
} |
1085 |
|
1086 |
static int floppy_eject(BlockDriverState *bs, int eject_flag) |
1087 |
{ |
1088 |
BDRVRawState *s = bs->opaque; |
1089 |
int fd;
|
1090 |
|
1091 |
if (s->fd >= 0) { |
1092 |
close(s->fd); |
1093 |
s->fd = -1;
|
1094 |
} |
1095 |
fd = open(bs->filename, s->open_flags | O_NONBLOCK); |
1096 |
if (fd >= 0) { |
1097 |
if (ioctl(fd, FDEJECT, 0) < 0) |
1098 |
perror("FDEJECT");
|
1099 |
close(fd); |
1100 |
} |
1101 |
|
1102 |
return 0; |
1103 |
} |
1104 |
|
1105 |
static BlockDriver bdrv_host_floppy = {
|
1106 |
.format_name = "host_floppy",
|
1107 |
.instance_size = sizeof(BDRVRawState),
|
1108 |
.bdrv_probe_device = floppy_probe_device, |
1109 |
.bdrv_open = floppy_open, |
1110 |
.bdrv_close = raw_close, |
1111 |
.bdrv_create = hdev_create, |
1112 |
.create_options = raw_create_options, |
1113 |
.bdrv_flush = raw_flush, |
1114 |
|
1115 |
.bdrv_aio_readv = raw_aio_readv, |
1116 |
.bdrv_aio_writev = raw_aio_writev, |
1117 |
.bdrv_aio_flush = raw_aio_flush, |
1118 |
|
1119 |
.bdrv_read = raw_read, |
1120 |
.bdrv_write = raw_write, |
1121 |
.bdrv_getlength = raw_getlength, |
1122 |
|
1123 |
/* removable device support */
|
1124 |
.bdrv_is_inserted = floppy_is_inserted, |
1125 |
.bdrv_media_changed = floppy_media_changed, |
1126 |
.bdrv_eject = floppy_eject, |
1127 |
}; |
1128 |
|
1129 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1130 |
{ |
1131 |
BDRVRawState *s = bs->opaque; |
1132 |
|
1133 |
s->type = FTYPE_CD; |
1134 |
|
1135 |
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
|
1136 |
return raw_open_common(bs, filename, flags, O_NONBLOCK);
|
1137 |
} |
1138 |
|
1139 |
static int cdrom_probe_device(const char *filename) |
1140 |
{ |
1141 |
if (strstart(filename, "/dev/cd", NULL)) |
1142 |
return 100; |
1143 |
return 0; |
1144 |
} |
1145 |
|
1146 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1147 |
{ |
1148 |
BDRVRawState *s = bs->opaque; |
1149 |
int ret;
|
1150 |
|
1151 |
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
1152 |
if (ret == CDS_DISC_OK)
|
1153 |
return 1; |
1154 |
return 0; |
1155 |
} |
1156 |
|
1157 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1158 |
{ |
1159 |
BDRVRawState *s = bs->opaque; |
1160 |
|
1161 |
if (eject_flag) {
|
1162 |
if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
1163 |
perror("CDROMEJECT");
|
1164 |
} else {
|
1165 |
if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
1166 |
perror("CDROMEJECT");
|
1167 |
} |
1168 |
|
1169 |
return 0; |
1170 |
} |
1171 |
|
1172 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1173 |
{ |
1174 |
BDRVRawState *s = bs->opaque; |
1175 |
|
1176 |
if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
1177 |
/*
|
1178 |
* Note: an error can happen if the distribution automatically
|
1179 |
* mounts the CD-ROM
|
1180 |
*/
|
1181 |
/* perror("CDROM_LOCKDOOR"); */
|
1182 |
} |
1183 |
|
1184 |
return 0; |
1185 |
} |
1186 |
|
1187 |
static BlockDriver bdrv_host_cdrom = {
|
1188 |
.format_name = "host_cdrom",
|
1189 |
.instance_size = sizeof(BDRVRawState),
|
1190 |
.bdrv_probe_device = cdrom_probe_device, |
1191 |
.bdrv_open = cdrom_open, |
1192 |
.bdrv_close = raw_close, |
1193 |
.bdrv_create = hdev_create, |
1194 |
.create_options = raw_create_options, |
1195 |
.bdrv_flush = raw_flush, |
1196 |
|
1197 |
.bdrv_aio_readv = raw_aio_readv, |
1198 |
.bdrv_aio_writev = raw_aio_writev, |
1199 |
.bdrv_aio_flush = raw_aio_flush, |
1200 |
|
1201 |
.bdrv_read = raw_read, |
1202 |
.bdrv_write = raw_write, |
1203 |
.bdrv_getlength = raw_getlength, |
1204 |
|
1205 |
/* removable device support */
|
1206 |
.bdrv_is_inserted = cdrom_is_inserted, |
1207 |
.bdrv_eject = cdrom_eject, |
1208 |
.bdrv_set_locked = cdrom_set_locked, |
1209 |
|
1210 |
/* generic scsi device */
|
1211 |
.bdrv_ioctl = hdev_ioctl, |
1212 |
.bdrv_aio_ioctl = hdev_aio_ioctl, |
1213 |
}; |
1214 |
#endif /* __linux__ */ |
1215 |
|
1216 |
#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1217 |
static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
1218 |
{ |
1219 |
BDRVRawState *s = bs->opaque; |
1220 |
int ret;
|
1221 |
|
1222 |
s->type = FTYPE_CD; |
1223 |
|
1224 |
ret = raw_open_common(bs, filename, flags, 0);
|
1225 |
if (ret)
|
1226 |
return ret;
|
1227 |
|
1228 |
/* make sure the door isnt locked at this time */
|
1229 |
ioctl(s->fd, CDIOCALLOW); |
1230 |
return 0; |
1231 |
} |
1232 |
|
1233 |
static int cdrom_probe_device(const char *filename) |
1234 |
{ |
1235 |
if (strstart(filename, "/dev/cd", NULL) || |
1236 |
strstart(filename, "/dev/acd", NULL)) |
1237 |
return 100; |
1238 |
return 0; |
1239 |
} |
1240 |
|
1241 |
static int cdrom_reopen(BlockDriverState *bs) |
1242 |
{ |
1243 |
BDRVRawState *s = bs->opaque; |
1244 |
int fd;
|
1245 |
|
1246 |
/*
|
1247 |
* Force reread of possibly changed/newly loaded disc,
|
1248 |
* FreeBSD seems to not notice sometimes...
|
1249 |
*/
|
1250 |
if (s->fd >= 0) |
1251 |
close(s->fd); |
1252 |
fd = open(bs->filename, s->open_flags, 0644);
|
1253 |
if (fd < 0) { |
1254 |
s->fd = -1;
|
1255 |
return -EIO;
|
1256 |
} |
1257 |
s->fd = fd; |
1258 |
|
1259 |
/* make sure the door isnt locked at this time */
|
1260 |
ioctl(s->fd, CDIOCALLOW); |
1261 |
return 0; |
1262 |
} |
1263 |
|
1264 |
static int cdrom_is_inserted(BlockDriverState *bs) |
1265 |
{ |
1266 |
return raw_getlength(bs) > 0; |
1267 |
} |
1268 |
|
1269 |
static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
1270 |
{ |
1271 |
BDRVRawState *s = bs->opaque; |
1272 |
|
1273 |
if (s->fd < 0) |
1274 |
return -ENOTSUP;
|
1275 |
|
1276 |
(void) ioctl(s->fd, CDIOCALLOW);
|
1277 |
|
1278 |
if (eject_flag) {
|
1279 |
if (ioctl(s->fd, CDIOCEJECT) < 0) |
1280 |
perror("CDIOCEJECT");
|
1281 |
} else {
|
1282 |
if (ioctl(s->fd, CDIOCCLOSE) < 0) |
1283 |
perror("CDIOCCLOSE");
|
1284 |
} |
1285 |
|
1286 |
if (cdrom_reopen(bs) < 0) |
1287 |
return -ENOTSUP;
|
1288 |
return 0; |
1289 |
} |
1290 |
|
1291 |
static int cdrom_set_locked(BlockDriverState *bs, int locked) |
1292 |
{ |
1293 |
BDRVRawState *s = bs->opaque; |
1294 |
|
1295 |
if (s->fd < 0) |
1296 |
return -ENOTSUP;
|
1297 |
if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
1298 |
/*
|
1299 |
* Note: an error can happen if the distribution automatically
|
1300 |
* mounts the CD-ROM
|
1301 |
*/
|
1302 |
/* perror("CDROM_LOCKDOOR"); */
|
1303 |
} |
1304 |
|
1305 |
return 0; |
1306 |
} |
1307 |
|
1308 |
static BlockDriver bdrv_host_cdrom = {
|
1309 |
.format_name = "host_cdrom",
|
1310 |
.instance_size = sizeof(BDRVRawState),
|
1311 |
.bdrv_probe_device = cdrom_probe_device, |
1312 |
.bdrv_open = cdrom_open, |
1313 |
.bdrv_close = raw_close, |
1314 |
.bdrv_create = hdev_create, |
1315 |
.create_options = raw_create_options, |
1316 |
.bdrv_flush = raw_flush, |
1317 |
|
1318 |
.bdrv_aio_readv = raw_aio_readv, |
1319 |
.bdrv_aio_writev = raw_aio_writev, |
1320 |
.bdrv_aio_flush = raw_aio_flush, |
1321 |
|
1322 |
.bdrv_read = raw_read, |
1323 |
.bdrv_write = raw_write, |
1324 |
.bdrv_getlength = raw_getlength, |
1325 |
|
1326 |
/* removable device support */
|
1327 |
.bdrv_is_inserted = cdrom_is_inserted, |
1328 |
.bdrv_eject = cdrom_eject, |
1329 |
.bdrv_set_locked = cdrom_set_locked, |
1330 |
}; |
1331 |
#endif /* __FreeBSD__ */ |
1332 |
|
1333 |
static void bdrv_raw_init(void) |
1334 |
{ |
1335 |
/*
|
1336 |
* Register all the drivers. Note that order is important, the driver
|
1337 |
* registered last will get probed first.
|
1338 |
*/
|
1339 |
bdrv_register(&bdrv_raw); |
1340 |
bdrv_register(&bdrv_host_device); |
1341 |
#ifdef __linux__
|
1342 |
bdrv_register(&bdrv_host_floppy); |
1343 |
bdrv_register(&bdrv_host_cdrom); |
1344 |
#endif
|
1345 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
1346 |
bdrv_register(&bdrv_host_cdrom); |
1347 |
#endif
|
1348 |
} |
1349 |
|
1350 |
block_init(bdrv_raw_init); |